Portable filter



FIG. 1 is a front perspective view of the portable filter.

FIG. 2 is a rear perspective view of the portable filter.

FIG. 3 is a right side view of the portable filter.

FIG. 4 is a top side view of the portable filter.

FIG. 5 is a front view of the portable filter.

FIG. 6 is a rear view of the portable filter.

FIG. 7 is another front perspective view of the portable filter, shown with the cap in an alternate position;

FIG. 8 is another rear perspective view of the portable filter.

FIG. 9 is another right side view of the portable filter.

FIG. 10 is another front view of the portable filter.

FIG. 11 is another top side view of the portable filter.

FIG. 12 is a bottom side view of the portable filter; and,

FIG. 13 is another rear view of the portable filter. 

The ornamental design for a portable filter, as shown. 